📝 Two Categories of Links in Data Link Layer

Q1. Which of the following best describes the two primary categories of data‑link layer links?

💡 Difficulty: easy | ✅ Correct: B

Q2. If a new router R5 is added and shares the same physical medium as R1 and R2, what logical change occurs to the classification of Alice’s links?

💡 Difficulty: medium | ✅ Correct: C

Q3. If the sole broadcast link in the network fails, what is the most likely effect on Alice’s ability to reach other ISPs through routers R2 and R4?

💡 Difficulty: hard | ✅ Correct: B